The amount of rocker is also really important, just like was said above. I find that the Spleene Door 159x45 is really great for light wind and I jump it all the time in heavier wind. The pads and fins are biased to the heelside, making it easier to hold when powered. I recently rode a board that is bigger than that, but the pads are set to far from the edge, making my shins hurt after about 10 minutes.
Now, the Spleene Door is really good for light wind, especially b/c it has ZERO rocker. However, that lack of rocker makes it a challenge to ride in anything bigger than moderate chop.
As far as stiffness goes, for going BIG, more is better. The flexier the board is, the more energy that you give up when loading up for a jump. BUT, the stiffer board is less forgiving and more difficult to jump in strong wind. You CAN have your cake and eat it, too, but it requires patience and tenacity. Good luck.
BTW, I had that Crazyfly Raptor Pro LTD 137 and it was a great board. A friend likened it to barefoot skiing behind the kite. However, at 230 lbs, I had to be LIT to ride it. Doesn't happen often enough here for me, so I had to sell her.